Side tank construction for bulk cargo vessels



W 6%. .Baz'fienfeld W. G. BARTENFELD SIDE TANK CONSTRUCTION FOR BULK CARGO VESSELS Filed Oct.

Jan. 15, 1957 SIDE TANK CONSTRUCTION FOR BULK CARGO VESSELS Wilford G. Bartenfeld, Lakewood, Ohio Application October 14, 1952, Serial No. 314,637

3 Claims. (Cl. 114-78) This invention relates to side tank construction for bulk cargo vessels.

The main object of the invention is to provide a side tank construction for lessening the possibility of damage to the side shell plating of the vessel which is often caused from impact of the clam shell bucket against the side tank plating and the transmission thereof through the generally employed struts extending from the side tank plating to the side shell plating and frequently resulting in the pushing outwardly of the side shell plating and thereby loosening the rivets at the outer seams thereof thus causing leaks.

Another object of the invention is to provide a side tank construction of said character which is sufliciently rigid and capable of withstanding the ordinary clam shell bucket bumping action yet possessing enough flexibility to relieve and ease ofi a blow of the usual or even a greater force.

Further objects of the invention are to provide a side tank construction of the above character which dispenses with the use of supporting struts and thereby not only is there a reduction in the weight of material used and a saving in cost, but more especially the elimination of damages to the side shell plating from being pushed out and thus loosening the rivets at the seams by impact of the clam shell bucket bumping against the side tank plating and therefore the avoiding of costly repairs.

For a clear understanding of the invention same is herein fully described with reference to the accompanying drawings and the novel features thereof will be pointed out in the claims.

In the drawings,

Figure l is a fragmental plan sectional view taken on line 1-1 of Fig. 2 and showing a side tank constructed of channels supported longitudinally by stringers;

Fig. 2 is a cross-sectional elevation taken on line 2-2 of Fig. 1 looking at the side shell frame;

Fig. 3 is a similar view to Fig. 2 taken on line 3-3 of Fig. 1 looking at the web frame;

Fig. 4 is a similar view to Fig. 2 showing a portion of an inclined side tank and the supporting stringers;

Fig. 5 is an enlarged view showing the side shell plating as in usual practice riveted together and to the side shell frames;

Fig. 6 is a plan sectional view, on an enlarged scale, illustrating the connection of the end side tank channels forming the side tank plating and the angle bar supporting stringers connected thereto and to the bulkhead; and

Fig. 7 is an inverted view of a portion of a stringer, a web frame, and side tank channels showing the use of a chock plate and a bar stiffener in the stringers.

Referring to the drawings, 1 represents the side shell plating of a bulk cargo vessel, which plating is of the usual construction, as shown in Fig. 5, consisting of overlapping plates 2 and 3 which are riveted together at 4 and caulked at the scams 5. The plates 2 and 3 are riveted as at 6 and 7 to the side shell frames indicated at 8, which are fixed to the bilge floors 9 and support at ted States Patent 0 their upper ends the main deck element brackets 10 extending inwardly to the rear side 11 of the side tank plating 12 of the vessel for supporting the deck element 13. The side tank plating 12 is constructed of vertically arranged channels 14 which are placed flange to flange extending outwardly and welded at the joints 15, and the outer sides of the webs of said channels form the side tank or hold of the vessel. Positioned before and after the side shell frames 8 and extending transversely from the side shell plating 1 to the inner side 11 of the Webs of the side tank channels 14 are the usual web frames 16 and 17 consisting of plates having their outer side edges fixed to the side shell plating by an angle bar 18 extending from the bilge floor 9 to below the deck element 13 and their inner contacting edges are welded at 19 to said side tank channels. The lower ends of the side tank channels 14 rest upon and are welded to the tank top 20 and same also are securely braced by brackets 21 from the floor plates 9. A sheer take up plate strap 22 between the upper ends of the side tank channels 14 and the main deck stringer 13 is employed.

The side tank construction consisting of several of the side shell frames 8, the web frames 16 and 17, and the side tank channels 14 extends from the fore bulkhead indicated by 23 to the aft bulkhead, and the end side tank channels are welded thereto and a corner angle bar 24 is provided.

The upper end portion of the side tank channels 14 are supported against outward movement by a continuous stringer 25 consisting of an angle bar having the free edge of its web notched at 26 to fit over the side by side flanges of said channels and engage and are Welded to the inner side 11 of the webs thereof. The web of the angle bar stringer 25 is welded to the underside of the deck brackets 10 with its flange extending downwardly in outer spaced relation to the side tank channels 14. The stringer 25 passes into and through aligning openings 27 provided in the inner edges of the web frames 16 and 17, and after installation of said stringer therein said openings are closed by chock plates 28.

For supporting the side tank channels 14 longitudinally intermediate their upper and lower ends to provide sufficient rigidity to the side tank channels or plating and also afford some flexibility and spring thereto in order to withstand the clam shell bucket bumping action and also give shock relief from the impact thereof and thus prevent or reduce damages, continuous angle bar stringers 29 and 30, which are similar to but of greater width and weight than the stringer 25, are employed. The stringers 29 and 30 are installed by passing same into and through longitudinally alining openings at 31 and 32 extending from the inner edges of the Web frame plates 16 and 17, and said openings are closed by chock plates 33 and 34. Bar stitfeners, indicated by 35, suitably spaced crosswise in the longitudinal stringers between the web frames afford additional strength and resistance.

The inclined side tank construction shown in Fig. 4 is as heretofore described except that the intermediate continuous longitudinal stringers which are at a right angle to the side tank channels are inclined downwardly and the openings extending from the inner edges of the web plates for accommodating said stringers would likewise be inclined.

From the drawings and description it is readily seen that a side tank plating for bulk cargo vessels constructed of vertically arranged channels supported by continuous longitudinal stringers and providing a side tank construction devoid of the usual struts or other compression members extending from the side tank plating to the side shell plating thereby removes the frequent cause of said side shell plating being pushed outwardly and the outer connecting rivets loosened resulting in leaks due to the clam shell bucket bumping action against the side tank plating being transmitted tothe side shell plating. Also that there is a saving in the weight and the cost of the material first used in the construction, and thereafter less expense in the making of repairs.

Having fully described my invention, what I claim is:

1. In a side tank construction for bulk cargo vessels, the combination comprising fore and aft bulkheads, bilge floors, side shell plating, frames fixed to the bilge floors and t0 the side shell plating, main deck brackets extend- 2 ing inwardly from and supported by said frames, web frames positioned before and after said side shell frames and extending inwardly from the side shell plating, the web frames having openings at their inner edges below said main deck brackets, a stringer passing into and longitudinally through said openings of the web frames and fixed to said main deck brackets, tank top plating supported by said bilge floors, side tank plating, and the side tank plating being supported by said tank top plating and by and between said bulkheads and by said stringer, said web frames constituting the sole structural members directly interconnecting said side shell plating and said side tank plating.

2. In a side tank construction for bulk cargo vessels,

the combination comprising fore and aft bulkheads, bilge floors, side shell plating, frames fixed to the bilge floors and to the side shell plating, main deck brackets extending inwardly from and supported by said frames, web frames positioned before and after said side shell frames and extending inwardly from the side shell plating, the

web frames having openings at their inner edges below said main deck brackets, a stringer passing into and longitudinally through said openings of said web frames and fixed to said main deck brackets, tank top plating supported by said bilge floors, side tank plating, the side tank plating being supported by said tank plating top and by and between said bulkheads and by said stringer, said web frames having openings at their inner edges intermediate said first named openings and their lower ends, and stringers passing into and through said openings of said web frames and fixed'to said side tank plating for providing rigidity thereto against clam shell bucket impact, said web frames constituting the sole structural members directly interconnecting said side shell plating and said side tank plating.

3. In a side tank construction for bulk cargo vessels, the combination comprising fore and aft bulkheads, bilge floors, side shell plating, frames fixed to the bilge floors and to the side shell plating, main deck brackets extending inwardly from and supported by said frames, web frames positioned before and after said side shell frames and extending inwardly from the side shell plating, the web frames having openings at their inner edges below said main deck brackets, a stringer passing into and longitudinally through said openings of said web frames and fixed to said main deck brackets, tank top plating supported by said bilge floors, side tank plating, the side tank plating being constructed of channels arranged verti cally and their flanges extending outwardly and welded together, and said side tank plating being supported by said tank top plating and by and between said bulkheads and by said stringer, and additional longitudinal stringers secured to said side tank plating, said web frames constituting the sole structural members directly interconnecting said side shell plating and said side tank plating.

References Cited in the file of this patent UNITED STATES PATENTS 1,147,732 Isherwood July 27, 1915 1,443,044 Rosener Jan. 23, 1923 1,679,926 Bartenfeld Aug. 7, 1928 2,021,629 Leigh Nov. 19, 1935 

